Calculating device



(No Model.) J. S. DURET.

CALCULATING DEVICE. v

N0."283,331. Patented Aug. 14, 1883.,

ai li y c Wa g v a, v 2

I i I WITNESSES .12 4' Q3 4 f I I v, i h A mh UNITE STATES PATENT OFFICE.

JAMES s. DURET, or PERU, INDIANA.

CALCULATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 283,331, dated August 14, 1883. Application filed April 10, 1883. (No model.

To all whom it may concern Be it known that I, JAMESS. DURET, of the city of Peru, county of Miami, and State of In diana, have invented certain new and useful Improvements in Calculating Devices, of whi oh the following is a specification.

My present invention is an improvement up-v on that for which Letters Patent of the United States, No. 233, 840, were granted me under date of November 2, 1880, as will be hereinafter fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof, and 011 which similar letters of reference indicate similar parts, Figure 1 is a face view of my complete device; Fig. 2, a longitudinal section of the same on the dotted line 2 2,- Fig. 3, a trans verse section on the dotted line y y; Fig. a detail longitudinal section, on an enlarged scale, on the dotted line as 00; and Fig. 5, a de tail cross-secti0n on the dotted line 20 '10, also on an enlarged scale.

In said drawings the portions marked A represent the base of the device; B, the sliding frame, and O the swinging-frame.

The base A is composed of a central or main portion and two end portions, which are secured thereto by hinges a, and which, when in use, are secured in line with the central portion by pins or bars (0 which are inserted in holes formed to receive them, which holes extend through said ends, past the hinges, into the central or main portion of the base. Upon this'base is mounted a sheet of paper, a upon which are printed the tables of figures showing the rate of taxation, valuation, installments, total taxation, &c., as described in my patent before referred to. This sheet is secured in position in the following manner: The pins (1/ being withdrawn, and the ends of the base folded down, the ends ofthe sheet are bent over the ends of the central portion of the base. The ends are then brought up in line, thus clamping and holding the paper tightly,

and the pins are replaced, securing said ends in position. WVhen it is desired to remove said sheet and replace it with another, it can be easily done, as will be readily understood. This construction of the base, while fully accomplishing this purpose, does not interfere the base A into the grooves a and which serve as guides for said frame to keep it in position upon said base. This I regard as a superior arrangement to that shown in said Letters Patent, in which the base had side pieces to hold the sliding frame in position, which is a more clumsy arrangement and sides, which are bent over around a portion of 6c would be impracticable with asectional hinged 1 base, such as I have now adopted.

Having thus fully described my said inven tion, what I claim as new, and desire to secure by Letters Patent, is

1. In a device for computing taxes, &c., the combination of abase composed of parts hinged together, the end portions of which, when unfolded, are in line with and extend beyond the center or main portion, and a sliding frame which is adapted to moveover said base, substantially as described, and for the purposes specified.

2. The combination, in a base for a calculat ing device, of a main portion, end portions hinged thereto, and pins or bars a, said base being adapted to receive said pins orbars and be thereby held rigidly in line with the main portion, substantially as set forth.

3. The combination of the sectional hinged base A, the paper a having tables of figures thereon, and secured tosaidbase by being inserted in the joints between the sections, and the sliding frame B, which is adapted to be moved over said paper, substantially as shown and described, and'for the purposes specified.

I11 witness whereof I have hereunto set my hand and seal at Indianapolis, Indiana, this 5th day of April, A. D. 1883.

' JAMES S. DURET, [L. s] r In presence of- G. BRADFORD, O. F. SAYLES. 

